Description: 《MIMO-OFDM关键技术的研究和完整仿真平台的建立》，建立了一个完整的MIMO-OFDM的仿真平台，为实际的硬件平台提供解决方案，给出性能评估。为建立这个完整的仿真平台，本文从MIMO-OFDM信号模型，提出系统实现的各个关键技术:帧同步和载波频偏估计、信道估计、采样同步和载波跟踪、空时/频编解码。- MIMO-OFDM key technology research and the establishment of a complete simulation platform , the establishment of a complete MIMO-OFDM simulation platform, for the actual hardware platform to provide solutions, given performance evaluation. For the establishment of the integrity of the simulation platform, this article from the MIMO-OFDM signal model, the system in all key technologies: frame synchronization and carrier frequency offset estimation, channel estimation, sampling synchronization and carrier tracking, space-time/frequency codecs. Platform: |
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Author:李继龙 |
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Description: ：研究了全球定位系统接收机的实现原理，给出了简单的数学模型，
并针对GPS接收机的关键模块，包括码元的捕获和跟踪、载波跟踪、数据提取等，利
用Matlab进行了仿真，给出了仿真结果。这对于关键模块的工程实现具有一定的参
考价值。-: The Global Positioning System receivers realize principle, given a simple mathematical model, and the key for GPS receiver module, including the key element of the capture and tracking, carrier tracking, data extraction, etc., using Matlab simulation, simulation results. This is the key module of the project to achieve a certain reference value. Platform: |
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Author:luoluo |
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Description: 快速可靠的GPS (全球定位系统)系统仿真可对双频GPS 接收机的设计、接收算法的研究
提供有效的帮助。文中详细介绍了在MatLab/Simulink 环境下GPS 系统仿真平台构建的基本方法。
首先分析了GPS 系统的各个环节，说明了各模型在仿真中的实现方法；然后给出了完整的系统仿
真框图，并在此平台上实现了GPS L2 载波相位跟踪的仿真。结果表明该仿真平台有效、可靠-Fast and reliable GPS (Global Positioning System) system simulation of dual-frequency GPS receiver design, receiver algorithm to provide effective help. Text in detail in the MatLab/Simulink environment GPS system simulation platform to build the basic method. First, we analyze the various segments of GPS systems shows that the model in the realization of simulation methods and then given a complete system simulation block diagram, and on this platform realize the GPS L2 carrier phase tracking of the simulation. The results show that the simulation platform for effective, reliable Platform: |
Size: 233472 |
Author:luoluo |
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Description: 介绍了一种基于锁频锁相环(FPLL)的载波跟踪算法。频率跟踪模块可以适应较大动态范围的频率变化，基于软件的数控振荡器(NCO)模块可以达到极高的频率跟踪精度。由于有锁频环的频率牵引，锁相环路滤波器可以设计得很窄，具有很好的抑噪性能，满足精确跟踪载波相位的要求。因此，该基于FPLL的载波跟踪算法可以适应信号存在较大的动态范围和噪声干扰的应用环境；同时，其鉴频鉴相算法表达式简单，易于用可编程数字器件实现。-Introduce an approach based on frequency-locking phase-locked loop (FPLL) carrier tracking algorithm. Frequency tracking module can adapt to a larger dynamic range of the frequency change, software-based numerical control oscillator (NCO) module can achieve the very high frequency tracking accuracy. Because of the frequency lock loop traction PLL filter can be designed very narrow, with very good noise suppression performance, to meet the precise requirements of carrier phase tracking. Therefore, the FPLL carrier-based tracking algorithm can be adapted to signal the existence of a larger dynamic range and noise of the application environment at the same time, the PFD algorithm expression is simple, easy to use programmable digital devices. Platform: |
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Author:何宁 |
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Description: 一种通用型PD雷达目标模拟器,介绍一种雷达目标模拟器，用两台高稳定度且具有外时基功能的频率合成微波信号源分别作为回波信号及杂波信号载波源，其外时基口作为雷达相参信号输入口。视频脉冲延时及多普勒撅移都可由计算机控制，模拟雷达与目标之间的不同距离及相对速度.模拟器收发共用一付
天线，天线安装在可旋转机构上，用以检测雷达角跟踪能力.
-A Common PD Radar Target Analogue
, introduced a radar target simulator, with two high-stability and external time base function of frequency synthesized microwave signal source, respectively, as the echo signal and the the clutter signal carrier source, its external time base port as radar coherent signal input port. The video pulse delay and Doppler pursed shift can by distance and relative speed between different computer controlled, simulated radar target simulator transceiver shared a pair of antenna, antenna mounted on the rotatable mechanism to detect radar angle tracking capacity. Platform: |
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Author:李亮 |
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Description: This paper describes an approach of implementing
software based GPS receiver acquisition and tracking for
L1 C/A signal on ADSP SHARC. The main objective of this
paper is bring out fast GPS signal tracking method using
which more number of channels(satellites) can be tracked on
a fixed and limited resources DSP platform. Further, GPS
acquisition, Carrier Pull-in and C/A Code prediction modules
are discussed.All the processing for the algorithms are done
using sign bit of the ADC.A time domain based approach
without early and late codes is used for Tracking GPS signal. Platform: |
Size: 272384 |
Author:zohreh |
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Description: GPS跟踪模块的载波跟踪环的仿真程序，可以成功的仿真载波跟踪的过程。-GPS tracking module carrier tracking loop of the simulation program can be a successful simulation of carrier tracking process. Platform: |
Size: 45056 |
Author:易凯 |
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Description: 灵巧干扰对直接序列扩频信号发射机和接收机的干扰仿真程序，包括通信发射机电路、接收机捕获电路、码跟踪电路、载波捕获电路、防假捕电路、信噪比估计电路和数据解调电路-Smart interference on direct sequence spread spectrum signal transmitter and receiver interference simulation program, including communications transmitter circuit, receiver capture circuit, code tracking circuit, the carrier capture circuit, anti-fake fishing circuit, SNR estimation circuit and data solution tone circuits, etc. Platform: |
Size: 47104 |
Author: yangle |
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Description: 该模型实现了一个通用的OFDM TX和RX，这是不依赖于任何特定的行业标准。该模型的目标是开发和研究不断（不是“突发”）载波同步和定时跟踪方案。该技术纳入然后可以扩展和修改，以标准的具体通讯套件。该模型采用了“收购”技术，它利用了循环前缀相关属性，以赶在试图完成罚款跟踪算法一帧的边界粗略的估计。该模型实现了一个16点64循环前缀的OFDM载波波形。在OFDM符号有16个飞行员，3后卫音（0，带边幅），并使用45 QAM的剩余数据流4。
这包括最新型的衰落信道，误码率计算，并改善控制回路动态。-This model implements a generic OFDM TX and RX, which is not tied to any particular industry standard. The objective of this model is to develop and explore a continuous (not “bursty”) carrier and timing tracking synchronization scheme. The techniques incorporated can then be extended and modified to suite specific communications standards. The model uses an “acquisition” technique that exploits the correlation properties of the cyclic prefix to get a rough estimate of the frame boundary before attempting to accomplish the fine tracking algorithms. The model implements a 64 carrier OFDM waveform with a 16 point cyclic prefix. The OFDM symbol has 16 pilots, 3 guard tones (0 amplitude at band edge) and uses 4 QAM for the 45 remaining data streams.
This latest model includes a fading channel, BER computation, and improved control loop dynamics.
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Size: 293888 |
Author:zaaa |
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Description: 本文在分析GPS 软件接收机跟踪原理的基础上，首先比较码环与载波环不同鉴相器的性能，然后对二阶锁相环中不同环路参数设下的跟踪效果进行仿真分析，最后设计
了合适的码环与载波环路，并用实际采集的GPS 数据论证了所设计环路的有效性，为GPS 软件接收机跟踪环路的设计提供了参考。-Based on the analysis of GPS receiver tracking software on the basis of the principle, first compare the different code loop and carrier loop phase detector performance, and the different second-order PLL loop parameters set by the tracking simulation analysis, the final design the appropriate code loop and carrier loop, and with real GPS data collected demonstrated the validity of the design loop for GPS receiver tracking loop design software provides a reference. Platform: |
Size: 634880 |
Author:herui |
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Description: 鉴于载波相位观测量可提供高精度定位信息的特点,分析了在高动态环境获得载波相位观测量的三种可
能方法,对三种方法的估计精度和动态跟踪能力进行了比较. 提出了一种适合GPS 系统的高动态环境载波相位
测量方案.-View of the carrier phase measurements can provide accurate location information, analyzes the dynamic environment in the high carrier phase measurements to obtain three possible methods, three methods of estimation accuracy and dynamic tracking ability was compared. Presents a GPS system for high dynamic carrier phase measurement program. Platform: |
Size: 267264 |
Author:herui |
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Description: 高动态给载波的跟踪带来了很大的困难,本文研究采用锁频环( FLL) 和锁相环( PLL) 相结合的方法来实现
载波跟踪-High dynamic to the carrier' s tracking has led to great difficulties, this paper uses frequency-locked loop (FLL) and phase-locked loop (PLL) methods to achieve a combination of carrier tracking Platform: |
Size: 181248 |
Author:herui |
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Description: 用了描述载波跟踪的小程序，学习接收机的同学都知道把-Describing the carrier tracking with a small program, students learn the receiver knows the Platform: |
Size: 1024 |
Author:wangtan |
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Description: 一个OFDM符号128个有效符号，插入128个虚拟子载波
符号率（即有效数据率）fsymbol，而发送速率（需要包括虚拟子载波）2fsymbol
输入的数据需要2倍的发送数据率，以便进行内插，实现位定时跟踪，即4倍fsymbol采样率的调制信号
OFDM symbol Nfft=128 points
一个OFDM符号数据点 Nfft*2 = 256 ， Guard Interval点 ＝Ng*2=64
- a OFDM symbol 128 effective symbols, insert 128 virtual sub-carrier
symbol rate (i.e. valid data rate), and fsymbol sending rate (need to include virtual sub-carrier) 2fsymbol
input data need 2 times the sending data rate for interpolation, realize a timing tracking, namely fsymbol sampling rates four times the modulation signal
OFDM symbol Nfft = 128 points
a OFDM symbol of data points Nfft* 2 = 256, Guard Interval point = Ng* 2 = 64
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Size: 40960 |
Author:fine |
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Description: 《深空微弱高动态信号捕获与跟踪算法研究与实现》深空通信领域载波同步恢复需要初步了解，其中信号多普勒斜率动态特性分析和解决办法值得借鉴。-"Weak deep-space high dynamic signal acquisition and tracking algorithm research and to achieve" deep space communications field carrier synchronization recovery requires a preliminary understanding of where the signal Doppler slope of the dynamic characteristics analysis and the solution is worth learning. Platform: |
Size: 2079744 |
Author:yangyi |
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Description: 载波跟踪算法综述 关于通信系统的载波跟踪算法的一篇综述文章，对于初学者了解载波跟踪算法有很大帮助-Carrier Tracking Algorithms on the communication system carrier tracking algorithm for a review article, for beginners to understand carrier tracking algorithms are very helpful Platform: |
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Author:sunnysnowhi |
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Search - A Carrier Tracking